From f3a487cd410e95cfa25fc04bd5305e8de72b13f7 Mon Sep 17 00:00:00 2001
From: "fupan.lfp" <fupan.lfp@antfin.com>
Date: Thu, 24 Sep 2020 17:48:53 +0800
Subject: [PATCH] rustjail: make the mount error info much more clear

Make the invalid mount destination's error info much
more clear.

Signed-off-by: fupan.lfp <fupan.lfp@antfin.com>
---
 src/agent/rustjail/src/mount.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/agent/rustjail/src/mount.rs b/src/agent/rustjail/src/mount.rs
index 8bc3152da..4f43ae180 100644
--- a/src/agent/rustjail/src/mount.rs
+++ b/src/agent/rustjail/src/mount.rs
@@ -176,7 +176,10 @@ pub fn init_rootfs(
     for m in &spec.mounts {
         let (mut flags, data) = parse_mount(&m);
         if !m.destination.starts_with("/") || m.destination.contains("..") {
-            return Err(anyhow!(nix::Error::Sys(Errno::EINVAL)));
+            return Err(anyhow!(
+                "the mount destination {} is invalid",
+                m.destination
+            ));
         }
         if m.r#type == "cgroup" {
             mount_cgroups(cfd_log, &m, rootfs, flags, &data, cpath, mounts)?;